Mortising-jig.



E. B. JONES.

MORTISING JIG.

APPLICATION FILED MAR. 25.1916.

1.21.6,942. Patented Jan. 2, 1917.

2 SHEETS-SHEET I- w/ jg r M 3;! W a7 orvza y E. B. JONES.

MORTISING HG.

APPLICATION FILED mamzs. 1916.

1,210,942, v Patented Jan. 2,1917.

2 SHEETS-SHEET 2- nu: mum's In": con FNOID-LIDHL. wnsnuva mu, 1! t ERNEST B. JONES, OF WEST CAN'AAN, NEW HAMPSHIRE.

MORTISINGJIG.

Specification of Letters Patent.

PatentedJan.2,:1917.-

Application filed March 25, 1916. Serial No. 86,786.

To all whom it may concern Be it known that I, ERNEST B. JoNEs, a citizen of the United States, residing at l/Vest Canaan, in the county of Grafton and State of New Hampshire, have invented certain new and useful Improvements in Mortising-Jigs, of which the following is a specification.

This invention comprehends certain new and useful improvements in boring and drilling appliances, and relates particularly to a mortising jig designed for use by carpenters and the like as a guide for any ordinary auger bit, in mortising for looks and doors or in connection with any other work where a number ofoholes are required in true alinement with each other.

The invention has forits primary object a durable and eficient construction of de- 2 vice of this character which will embody comparatively few parts that may be very easily manufactured and readily assembled andwhich will not be liable to get out of order and wherein the required adjustments may be very easily made and the parts readily, held in their adjusted positions, so that the holes may bebored in true alinement with each other and at the desired distances apart.

Theinvention has for a further object an improved device of-this character provided with improved means whereby the guide member for the auger bit may be very easily adjusted-both longitudinally and lat sfierally' as required, and held at its desired longitudinal and lateral adjustments without anyldangerof slipping. g

A still, further object ofithe invention is a mortising jig inwhich there are a number ,40 of collets of vary ng internal diameters acv cording to the size of. the auger bit used and.

in which these collets are uetachably connected to the collet holder of the apparatus in a manner which will preclude all liability of accidental displacement or detachment,

while at the same time the parts are so correlated that one collet may be very easily slipped out and replaced by another with very, little work. And; the invention also aims to generally improve devices of this class so asto render them more useful and commercially desirable.

With these and other objects in view, as will more fully appear as the description proceeds, the invention consists in certain constructions arrangements and comolnations of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention, reference is to be' had to the following description and accompanying drawings, wherein, Figure 1 is a perspective view of a mortising jig embodying the principles 'andimprovements of my invention. Fig. 2- is a I plan view of the frame of the device, the cross-head and its concomitant parts being omitted. Fig. 3 is a detailview of the cross I head. Fig. 4: comprises a side and inner or bottom end view ofone of the collets used. Fig. 5 is a detail View of a clamping ring emploved for securing the collet holder at the desired lateral adjustment on the cross-head of the frame. Fig. 6 is part section and part elevation showing said'clamping ring and collet holder detached from the cross-head. Fig. 7 is a sectional side elevation of the collet holder and collet therein. Fig. 8 is a detail sectional view through the cross-head, and Fig. 9 is an inner or bottom plan view of the collet holder hereinafter more'specifically referred to;

Corresponding and like parts are referred to in the following description and designated in all of the views of the accompanying drawings by like reference characters,

"My improved mortising jig comprises a frame or visefdesignated A as a whole, and'including longitudinally spaced cross bars 1 which are preferably in the form of castings with angularly' disposed parallel end arms 2 and 3. A preferably wooden clamping member 4; is secured by screws'or similar fastening devices to the inner side of one pair of end arms 2 of the bars 1 and the other arms 3 of said bars at corresponding ends are formed with screw-threaded apertures through which the threaded shanks 5 of adjusting screws 6 work, said screws being provided at their outer ends with hand-wheels 7 or the like, by which they may be easily turned. The inner end of each adjusting screw dis swiveled in a bearing 8"which is provided with a base plate 9, that is securedby screws or similar fastening devices to a preferably wooden clamping member or'board l' that is complemental to the board 4:, these two boards constituting clamping members of the de vice and, being of'wood, serve to hold the frameor visesecurely in place-without any danger ofmarring fine woodwork? The bars 1 are comiected together, in spaced relation, bymeans of longitudinally extending rods 10, the ends ofwhich are re-' ceived and secured within apertured bosses 11 formed on the cross bars 1 at the endsthereof, as clearly illustrated in Figs. 1 and 2, and these rods 10 not only serve as parts of the frame itself, to hold the bars 1 in fixed relation to each other, whereby a firm framework is produced, but they also serve as guides for a cross-head 12. The cross head 12 is designed to extend from one rod 10 to the other, and is formed on one face with correspondingly projecting laterally extending flanges 13 that are provided at their ends with apertured ears 14 through which the rods 10 extend, whereby the cross head may slide longitudinally upon the rods and to hold the cross-head in different adjusted positions, I provide one or more set screws 15 extending through the cross-head 12 and designed to impinge against the rods, only one of these sets screws being employed in the present instance, although it is to be understood that the invention is not limited in this regard. The cross-head 12 is also provided with correspondingly projecting flanges 16 that extend laterally as best illus trated in Fig. 1, in a direction opposite to the flanges 13, each of the flanges 16 being formed with an undercut or channel 17, and said channels facing each other, as'shown. These channels 17 serve to guide and receive a base plate 18, which forms part of a collet holder 19, said collet holder being of cylindricalformation, as shown, and being exteriorly 'screwthreaded, as at 20, whereby a clamping nut or ring 21 may be mounted thereon. This clamping nut 21 is designed to bear'frictionally against the outer faces of the flanges 16 when screwed thereagainst, so as to fasten the collet holder in the desired laterally adjusted position. The cylindrical body portion of the collet holder 19 isalso interiorly screw-threaded, as best indicated at 22 in Fig. 7, to receive an ex ternally'screw-threaded collet'23, and it is to be understood thatthere area number of these collets provided with each jig, so that the same device may be used to guide auger bits of different sizes or diameters.

'From' the foregolng description, in con 'ne'ction with the accompanying drawings,

the'operation of my improved mortising ig will be apparent. In the'practical use of the device,the vise is applied, for example, totheedge of the door where the mortise 'is to be made with the clamping members 4 and embracing the edge of the door between them,'the frame of the vise being very easily and quickly secured in position by the manual operation of the adjusting Then the cross-head 12 is adrods 10 and held in the desired position by means of the set screw 15, and the collet holder adjusted laterally and held in the desired position by .meansof the clampin nut 21. Thus it will be seen that the desired adjustments may be very easily effected, first by shifting the collet holder laterally upon the cross-head and then looking it securely in place and subsequently by shifting the cross-head itself longitudinally upon the guide rods 10 to bore one hole after another, the'holes being bored in absolutely true alinement with each other and at any desired distances. apart, according to the amount of adjustment of the cross-head upon the rods.

The device is composed of comparatively few partsthat are not'liable to'get' out of order and that can be very readily assembled and the required adjustments made with considerable facility.

While the accompanying drawings illustrate what I believe to be the preferred em-j bodiment of my invention, it is to be undermember secured to the arms at one endof. said bars, adjusting screws workingthroughthe other arms of said bars, a clamping member connected to the inner ends of said screws, guide rods connecting said bars together in spacedrelation to, each other, a cross-head slidable longitudinally on said rods, means for holding said cross-head in different positions on said rods, and a collet holder carried by saidcross-head, the crosshead being provided with flanges formed with laterally. extending channels facing each other, and the collet holder being pro vided with a base plate slidable in said channels and with a clamping nut adjustable on the holder and designed to bear against said flanges whereby the collet holder may be fastened at different lateral adjustments on the cross-head.

2.. A mortising jig including a vise, provided with. guide rods, a cross-head formed on one face with laterally extending flanges having apertured ears receiving said guide rods and by which the cross-head is slidable lib on said rods, means for holding the cross- I head at different adjustments on said rods, the cross-head being formed on its opposite face with laterally disposed flanges formed with channels, a collet holder having a base plate received in said channels, whereby it is mounted for sliding movement laterally on the cross-head, the collet holder also embodying a cylindrical body portion having external screw-threads, and a clamping nut working on said screw-threads and adapted to bear against the last named flanges whereby the collet holder may be fastened in different adjusted positions.

3. In a mortising jig, a collet holder provided with a base plate, in combination with a cross-head having guides in which the base plate is receivable, said collet holder being also provided with a cylindrical body portion having external screw threads, a clamping nut working on said screw threads, for the purpose specified, said body portion being also internally screw-threaded, and a collet receivable in said cylindrical body portion and externally screw-threaded to engage the internal threads of the holder.

4. A mortising jig of the character described, comprising spaced bars having angularly disposed end arms and formed at its end with apertured bosses, guide rods received in said bosses and securing the crossbars together in spaced relation to each other, a board fastened to the inner face of the arms at corresponding ends of the cross bars, adjusting screws working in the other arms of said bars, another board secured to the inner ends of said screws, a cross-head formed with apertured cars by which it is mounted for sliding movement on said rods, a set screw working through said cross-head and adapted to impinge upon one of said rods to hold the cross-head in different adjusted positions, the cross-head being formed on one face with laterally extending flanges provided with channels, and a collet holder having a base plate movable in said channels and a cylindrical body portion formed with external screw threads, and a clamping nut wo-rking on said screw threads and adapted to bear against said flanges whereby the collet holder may be fastened at different lateral adjustments of the cross head.

In testimony whereof I aflix my signature witnesses.

in presence of two ERNEST B. JONES.

Witnesses:

RALPH T. BARNEY,

C. O. BARNEY.

Copies of this patent may be obtained for five cents each, by' addressing the Commissioner of Iatents, Washington, D. G. 

